38181868997619 has 8 divisors (see below), whose sum is σ = 50921921065680. Its totient is φ = 25448198130656.

The previous prime is 38181868997581. The next prime is 38181868997639. The reversal of 38181868997619 is 91679986818183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38181868997619 - 2⁷ = 38181868997491 is a prime.

It is a super-2 number, since 2×38181868997619² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38181868997639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595286312 + ... + 1595310245.

It is an arithmetic number, because the mean of its divisors is an integer number (6365240133210).

Almost surely, 2^{38181868997619} is an apocalyptic number.

38181868997619 is a deficient number, since it is larger than the sum of its proper divisors (12740052068061).

38181868997619 is a wasteful number, since it uses less digits than its factorization.

38181868997619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190600549.

The product of its digits is 2257403904, while the sum is 84.

The spelling of 38181868997619 in words is "thirty-eight trillion, one hundred eighty-one billion, eight hundred sixty-eight million, nine hundred ninety-seven thousand, six hundred nineteen".